Hello Betsy, and thank you for the comment. As Jesus Christ Himself said in Matthew 7:16, 20 - "By their fruits you shall know them." False preachers will not be fulfilling the message of Christ's Gospel, preaching and teaching what He taught, and will not be doing miracles for the "good." They will be receiving their power from Satan and be on the same destructicve path that he is on daily. (John 8:44; 2 Thessalonians 2:9-10; 1 Peter 5:8) That is why we must put on the whole armor of God, so that we can know and understand the message of Jesus Christ, and be able to tell the difference when, and if, the time comes. (Ephesians 6:10-18) I hope and pray that this helps!